HP 3PAR T-Class Installation and Deinstallation Guide

owner, owner
node
See logical disk owner node.
parent volume A virtual volume from which a child volume (virtual or physical copy) is made.
parent-child
relationship
The relationship between two virtual volumes in which the parent volume contains information
needed to reconstruct the child volume.
parity set See RAID 5 set.
parity set position The group of chunklets that occupy the same position within a RAID 5 logical disk parity set.
PCI load card An electronic circuit board that is inserted into a controller node’s PCI slot. The PCI load card
allows the node to recognize an unoccupied PCI slot.
PDU See power distribution unit.
physical copy A point-in-time copy of an entire virtual volume.
physical disk A dual-ported Fibre Channel disk mounted onto a drive magazine.
physical parent The source volume for a physical copy.
port-presents
VLUN template
A rule that allows any host connected to a particular port to see a virtual volume as a specified
LUN.
power bank A group of four connected AC outlets within the power distribution unit. There are two power
banks in each PDU.
power distribution
unit (PDU)
A device that takes in AC power from a main power source (for example, an electrical wall outlet)
and distributes the power to the power supplies in a storage system.
power supply A device that converts current from an AC line into appropriate DC levels and provides that
power to a storage system component.
preserved data Data that is suspended in the system’s cache memory because of backend failure.
preserved data
logical disks
RAID 10 logical disks created by the system during initial system setup to store preserved data.
The logical capacity of the preserved data logical disks is equal to the sum of all data cache
memory of the system.
primary system A storage system from which virtual volumes are copied from during a remote copy operation.
See also 3PAR Remote Copy, remote copy, and secondary system.
rack The EIA-standard rack within a cabinet that holds the components of a storage system.
rack filler panel A panel used to seal off an empty 1U, 2U, or 4U space on the rack. All empty spaces in the rack
must be sealed for EMI and airflow considerations.
rack unit (U) The standard unit of height for an EIA-standard rack or components housed in an EIA-standard
rack: equivalent to 1.75 in. (4.45 cm).
RAID Redundant array of independent disks.
RAID 0 set Striped rows of chunklets on two or more physical disks. A RAID 0 set offers no data redundancy.
RAID 1 set A group of mirrored chunklets.
RAID 5 set A group of parity-protected chunklets. Also known as a parity set.
region A subdivision of a virtual volume whose size is a multiple of 32 MB.
remote copy Copying virtual volumes from a storage system designated as primary to another storage system
designated as backup. See also HP 3PAR Remote Copy, primary system, and secondary system.
remote system See backup system.
row A grouping of RAID 1 or RAID 5 sets. Data is striped across the rows of RAID 10 and RAID 50
logical disks.
row size The number of sets in a row.
safety breaker The device used to power on and power off the power distribution unit. The safety breaker also
prevents power surges in the AC line from damaging a storage system.
second virtual
volume backup
node
The controller node that takes over for the virtual volume backup node if the virtual volume node
fails.
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